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Size Distribution of Casein Micelles in Sheep Milk Studied by Dynamic Light Scattering

The aim of this study was to investigate size distribution of casein micelles in raw sheep milk during lactation using DLS method (Dynamic Light Scattering). Eleven samples of fresh bulk raw milk were collected during lactation of east Friesian sheep, every 14 days, during 2007. The size distribution of casein micelles, in the prepared suspensions, was measured by DLS method using Zetasizer Nano ZS Malvern, UK, instrument operated with a green laser (532 nm). Data processing was carried out by the Automeasure software (Malvern Instruments). The results indicated size heterogeneity of casein micelles during lactation period.

casein micelle; sheep milk; size distribution; DLS

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